Crankshaft main journal grinder



P 2, 1952 F. R. HENDERSON CRANKSHAFT MAIN JOURNAL GRINDER 2 SHEETS -SHEET 1 Filed June 7, 1951 N w MR T E I II II M a VN m 2 w 2 m% 2 E T R R U a I G o 3 2 a my R F E 'Ifl R in U \l m F ATTORNEY.

S p 1952 F. R. HENDERSON 2,608,806

CRANKSHAFT MAIN JOURNAL GRINDER Filef'l June 7, 1951 2 SHEETS-SHEET 2 54 50 r54 rfiflu l W31! FIGURE 6.

w 7\ H Q r o 40 so 42 FIGURE 7.

o I4 -E 5*?"50 54' 56 FIGURE 3. FIGURE 8 GURE 4' M-E5 H EI'5=\F%: 24' -24 INVENTOR. FRED ROBERT HENDERSON FIGURE 5. KATTORNEY Patented Sept. 2, 1952 2,608,806 1. l. MAIN JOURNAL GRINDER I I Fred Robert Henderson, Kansas City M0, 2 i'Applica'tion June '7, 1951, Serial No. '230,397 j .This inventionr'elates' to anparatusfor grinding main journalsfofj'a'crank shaft'fwhile'" the crank shaft 'remains in the engine block or a motorcaror truck. a g

Heretofore apparatus hasbeen used for grinding connecting rod journals by clamping the device aboutthe journal and allowing it to'move up'jand down in the engine block while the joinnal"i'sb eing ground b-ut this apparatus is not suitable'or applicable to grinding the main journals. 'Another' device has been used for adjusting the apparatus for grinding the connecting rod journals at 'right angles'to the longitudinal axis of the'crank shaftjb'y tilting the grinding apparatus on the connecting rod journal. An-

other' device is a grinding apparatusrigidly bolted to thefconnecti'ng rod witii the connecting rod clamped "against the journal-in a -rigidand unadjustable manner with respect to-alignment of the grinding apparatus" on its crankshaft An object of the present inve'ntion'is to provide a grindstone mounted on a shaft in a frame-fulcrumed' on an elongated support parallel there with andhave aflexible and adjustable means of coupling to the main journal bearing flange,

the bearing liner'being removed and an adjustment "provided for aligning and l holding the grindstone shaft at right anglesto the longitudinal axis of the crankshaft. 4 f

With these main'obje'cts' in viewfthe invention is more fully understood from thedrawingathe following specification and the scope of the claims appended.

In the drawings:

'Figure' 1 illustrates a fragmentof an engine block in a motor car or truck.-a. cross sectionoi a main journal with the lower bearing cap and liners removed, and an elevation of the present grinding apparatus, the coupling and-adapter parts being broken to show the interior thereof.

Figure 2' is an elevation or the elongated support member turned at 90 degrees on its longitudinal axis from that illustrated in Figure 1.

Figure 3 is a bottom view illustrating the anchor stirrup and adjustment connected to the elongated support member, the bottom of the motor being attached to the elongated member showing the limit means for fulcrum movement of the motor and grindstone shaft.

Figure 4 is a fragmentary bottom view of a crank shaft mounted in an engine block with the bearing liners and cap removed from the main journal, the adapter plate being bolted to the bearing flange and the support coupling at- 1 a .2 Claims. (01. 51-241) tached. A- grindstone --is illustrated on the journal.

Figure 5 illustrates a side elevation ofa main journal bearing frame with the lower cap, and liners removed and a fragment of the elongated support member attached to the adapterc'plate. Figure 6 is an elevationof the .coupling used for anchoring and supporting the elongated supportmember. r, g... s,

Figure 7' shows the end of the coupling-having an internal thread for connection of theelongated support memben-w v Figure 8 is a view illustrating the adapter plate having a tapped hole in the center thereof. and bolt or cap screw slots'at eachiend thereof.

The engine block 9. usually remains in the :motor chassis andhas theusual crank caseand selected main bearing-j cap 1 with liners, removed, the removed items are not illustrated because of their well known construction andtheir removal for the use ofthe presentapparatus; The-engine block 9 has'the journal bearing 'uppercap I0 integral therewith and usually provided with two holes H on each flange; l;2;oi.the ;cap In. An adapter plate I3 is preferably ofiarectangular shape and thickpenoughj for-suflicient threads l4 tapped'therein toreceive} and hold a coupling [5 consisting .of a threaded: shankl 6, cap [1, and eccentric-tappedthread i8.) This eccentric coupling l5 supports the upper threaded end IQ of the elongated: supp rt member 20, and

a hinge 2| on the lower endof supportm'emberfl.

is provided :to 'connectto the lower portion of the elongated member-.22.. look nut 2 3 1gcks the shank [6 of. the: eccentric coupling;a gainst the adapter plate l3and capjscrews 24ghold-the adapter plate l3 against the upper bearing cap flange l2.

The elongated support member 2. .15 preferably round and has fulcrumed thereon; arms 25 and 26 at 21 and 28.. The arms 25 and 2-6 are joined to. a frame 29 which contains and supports an extension shaft 30 on an electric motor 3|, the extension shaft 30 being coupled to the motor shaft 32 by coupling 33. The upper end of the extension shaft 30 is provided with an attached grindstone 34. The grindstone 34 is preferably a cylindrical shape and has a flat face 35 bearing against the journal 33 by means of screw pressure but the movement thereof toward the crank shaft is limited by the micrometer adjustment 3'! engaging threads 38 on the corners of the squared shank 39 of the elongated member 22. The squared shank 3-9 rigidly holds the boss 40 of arms 4| against rotation and receives the 3 limit screws 42 adapted to bear against the limit lug 43 of the electric motor 3 i.

The coil compression spring 44 is mounted on the elongated member 22 between the anchored collar 45 and sliding collar 46, bearing against the fulcrumed arm 26 which is slidable on the elongated support member 22.

The flange 41 of the engine block 9 has a stirrup shaped bar 48 cap screwed thereto by cap screws 49, and the extended arms 50 thereof are provided with adjustment holes 51 to receive cap screws 52 passing therethrough into the tapped threads 53 of the connecting arms 54. The connecting arms 54 have a threaded adjusting rod -55 mounted therein and is turned by thumb knob 56. A guide rod 5! is mounted between the connecting arms 54 and a guide 'membe'rts slides thereon. The threaded rod 55 passes through the tapped hole 59 in the guide member 58 and a slot 68 is provided in the outer end of theguidc member 58. to receive the elongated support m'ember'22u, l c

Figure 5 differswithFigure l in that it is a modified view, illustrating the felongated support member beingscrewed into the adapted plate i 3"and the lock nut 23 hcldingit in a locked position. This modified view of Figure 5 eliminates the eccentric coupling only whenone make of engine blocks are used, however, the eccentric coupling is necessary for various-makes of engine blocks because of the diflierent centers between bap'screws'of the main bearings. v p

In the iise of the present device the engine preferably remains in the chassis and the crank case and lower bearing cap with liners are removed The"adapted plate i3'is cap screwed to on'eofthe flangesof'the upper cap and either the eccentric coupling [5 or an extended shaft it is screwed into the' cap threads 14. The lock nut 23 may be used to lock :the coupling 15 or an extension of theshaft ifiasia modified form. The

coupling lial'soprbviides for different diameters breasted threads.

The "shaft *or upper elongated support mem- 'b'er'Zp may bereplacd 'at the hinge point for differentdiameters of attachment when necessaryfaiid the object of thehinge is to allow the 'mbtl with shaft fulcrumed "on the elongated support-member 22 tomove on the hinge and be held in position by guidem'ember 58. This guide member is moved longitudinally with respect to the longitudinal axis of the'crank shaft by means iof'the screw 55 and thumb'nut 56. The'arms 55 supportthe "screw and are connectedto stirrup extended ends -'50,thecrank'case flange 41 rigidly holding the 'stir'rupby'means of the cap screws [What I claimfas' new and desire to secure by Letters Patent is:

1. Main journal grinding apparatus for an engine blo'ck in' amotor car having a-crank shaft file of thi's patent:

mounted in the engine with the cap removed from the journal to be ground, comprising, an eccentric coupling, means for connecting the eccentric coupling to the block bearing flange, a shaft, a grindstone, a frame, said shaft passing through said frame and receiving the grindstone on the end thereof, an elongated support memher, one end of said support member being con-- nected to I said eccentric coupling, a :hinge, said hinge being in said support member below said eccentric coupling, said support member being spaced parallel with said shaft, means to sup-- port said frame on said support member, means to fulcrum said frame on said support member, means 'to limit the movement of said frame on said support member, a member having a slot in the end'the'reof -adapted to slide longitudinally on said support member and co-operate therewith as a guide to adjust the support member on saidhinge, means to move and hold said memher with the s ster the end thereof [lengthwise with respect :to the crank sliaftto adjust the support member with shaft and grindstone 'at right angles to the axisof the crankshaft, and means to rotate sa'id shaft. I

2, Main; journal grinding "apparatus for "an engine block in shear car having a crankshaft mounted-in the engine "with the 'cap removed from the -jour'fnal to the groans, comprising, a coupling, means for connecting the coupling to the blocl; bearing flange, 'a shaft, agnndstone, a frame,-said shaft pass ing through-'saiclfra'rne and receiving the grindstone on the end -thereof, "'an elongated support member, one end of saidsu'pport member being connected'to said coupling, a hinge, said'hinge-being insaid support member below said coupling, :said suppoit'niember being spaced parallel with [said shaft, i means 'to support-said frame on saidsupport "member, means to fulcrum said frame on said support member, means to limit ;the movement of said frame on said support member amember havinga slot in the end thereof adapted toslide longitudinally 'on saidsupport member andco-operate therewith-as to rotate said shaft.

FRED- ROTEERT I-IEN DE RJSQN.

REFERENCES or'iiiiii The following references are of record in the Number me e 2,298,0(15 Fugl'iea; Oct. 16, 1942 --l Nome-1951 2574328 Sawyerd. 

